Sani Marc 30-07255-06 16kg Chlor Ultra 2 in 1 Stabilized Chlorinating Tablets is a stabilized chlorine sanitizer for pool water. Its unique and innovative stabilized chlorine and zinc oxide formula disinfects water by destroying bacteria and algae more efficiently. Its stabilized formula keeps chlorine working longer by offering long-lasting protection against the sun’s ultraviolet rays of the sun. The premeasured tablets also simplify dosing.